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Flight Reliability

DL 4929 · Delta Air Lines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and DL 4929 moved between routes during this period. Numbers below combine all of them, so treat them as background, not a verdict. For a cleaner answer, check the route you are actually flying.

Combined across all its routes

75%
Arrive within 15 minutes
10 min
Average arrival delay
3.2%
Cancelled
11 min early
Median arrival delay

Based on 442 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon88%(58 flights)
  • Tue72%(60 flights)
  • Wed71%(59 flights)
  • Thu65%(60 flights)
  • Fri86%(59 flights)
  • Sat78%(73 flights)
  • Sun63%(57 flights)
On-time by departure window
  • 9 AM–12 PM78%(216 flights)
  • 12–3 PM73%(186 flights)
  • 3–6 PM70%(23 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
77%
Apr

Jun 71% → Apr 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202571%56
July 202572%57
August 202567%54
September 202597%58
October 202580%60
November 202569%55
December 202563%41
March 202680%15
April 202677%13
Departures on time
76%
Diverted
0.5%
Flights flown
426
Months covered
12

Keep nerding

Based on 442 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.